Shock Absorber. Absorbing impact and noise. Shock absorber. Series D- -X. Shock absorber: RB series Coolant resistant type: RBL series

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1 hock Absorber RB eries Absorbing impact and noise Dampening to meet the high speed requirements of the modern world. hock absorber: RB series oolant resistant type: RBL series hock absorber Automatic adjustment to the most appropriate absorption performance pecially designed orifice can absorb energy comprehensively and most appropriately in many different applications. This ranges from high speed low loads, to load speed high loads; without requiring additional adjustment of the shock absorber. Usable without a stopper nut The strong body can be positioned directly. Example of comparison for drag characteristics Dashpot Rubber bumper hort type: RBQ series Drag M shock absorber (Large energy) A compact type that has been shortened lengthwise Allowable eccentric angle is uitable for absorption of rotation energy. Usable without a stopper nut The strong body can be positioned directly. M shock absorber (mall energy) troke Drag waveform will vary depending on the operating conditions. RJ RB eries Variations eries Thread O.D. size With cap or bumper (Option) Hexagon nut topper nut (Option) Foot bracket Page RB eries RB series M, M, M0, M, M0, M7 99 Optional specifications are not available for M. oolant resistant RBL series M0, M, M0, M7 90 RBQ eries RBQ series M, M0, M, M30, M3 90 Hexagon nuts are attached for the RB series and standard models RBQ. 9 D- -X

2 hock Absorber RB eries Technical Data: election election tep. Type of impact ylinder stroke at load (Horizontal) ylinder stroke at load (Downward) ylinder stroke at load (Upward) onveyor stroke at load (Horizontal) Free horizontal impact Free dropping impact Rotating impact (With torque). Enumeration of operating conditions ymbol Operating condition Unit m Impacting object mass kg ollision speed m / sec h Dropping height m ω Angle speed rad/sec R Distance between axis of cylinder and impact point m d Bore size mm p ylinder operating pressure MPa F Thrust N T Torque N m n Operation cycle cycle / min t Ambient temperature µ Friction coefficient 3. pecifications and operational instructions Ensure that the collision speed, thrust, operation cycle, the ambient temperature and atmosphere fall within the specifications. Be aware of the min. installation radius in the case of rotating impacts. election Example. Type of impact ollision speed () Kinetic energy E Thrust energy E Absorbed energy E orresponding () mass of impacting object Me. Operating conditions 3. pecifications and operational instructions ylinder stroke at load (Horizontal) m = kg = 0. m/s d = 0 mm p = 0. MPa n = 30 cycle/min t = onfirmation of specifications 0. <.0 (max.) t 0 (min.) < < 0 (max.) F F 39.3 < YE ylinder hock absorber m F E + E E. Operating conditions m = 0 kg = 0.3 m/s d = 0 mm p = 0. MPa n = 0 cycle/min t = 3. onfirmation of specifications 0.3 < (max.) pecifications t 0 (min.) < < 0 (max.) and operational F F < 9 (max.) instructions YE. alculation of kinetic energy E Using the equation suitable for the classification of impact. In the case of cylinder stroke at load and free horizontal impact, substitute respective figures for Data A in order to calculate E.. alculation of thrust energy E elect any shock absorber as a provisional model. In the case of thrust energy of cylinder E, substitute respective figures for Data B or Data.. alculation of corresponding mass of impacting object Me Absorbed energy E = E + E orresponding mass of impacting object Me = E ubstitute both absorbed energy E and collision speed for Data A in order to calculate the corresponding mass of the impacting object Me. 7. election of applicable model Taking into consideration the corresponding mass of the impacting object Me, calculated using Data D and collision speed, check provisional model compatibility with the condition of application. If this is satisfactory, then the said provisional model will be the applicable one. on election In order for the shock absorbers to operate accurately for long hours, it is necessary to select a model that is well-suited to your operating conditions. If the impact energy is smaller than % of the maximum energy absorption, select a model that is one class smaller. 9. alculation of kinetic energy E. alculation of thrust energy E. alculation of corresponding mass of impacting object Me 7. election of RB00 Kinetic energy E Use Formula to calculate E. ubstitute.0 for m and 0. for. E 0. Thrust energy E Provisionally select a model RB00 and make the use of Data B at left. According to d = 0, E is obtained. E 0.7 orresponding mass of impacting object Me Use the Formula Absorbed energy E = E + E = 0. to calculate Me. ubstitute 0. for E and 0. for. Me.3 election of RB00 RB00 satisfies Me =.3 < 3 kg (Max. corresponding mass of impacting object). Ultimately, it will result in an operating frequency of 30 < 0, without causing a problem. YE. alculation of kinetic energy E. alculation of thrust energy E. alculation of corresponding mass of impacting object Me 7. election of applicable model Kinetic energy E Use Formula to calculate E. ubstitute 0 for m and 0.3 for. E.3 J Thrust energy E Provisionally select a model RB0 and make the use of Data B. According to d = 0, E is obtained. E 9. J orresponding mass of impacting object Me Use the formula Absorbed energy E = E + E = =.7 J to calculate Me. ubstitute.7 J for E and 0.3 for. Me 0 kg election of applicable model According to Data D, the tentatively selected RB0 satisfies Me = 0 kg < 00 kg at = 0.3. Ultimately, it will result in an operating frequency of n 0 <, without causing a problem. YE elect RB0

3 hock Absorber RB eries. Type of Impact ylinder stroke at load (Downward) ylinder stroke at load (Upward) onveyor stroke at load (Horizontal) Free dropping impact Rotating impact (With torque) Type of impact ylinder (3) ylinder ollision speed () Kinetic energy E Thrust energy E Absorbed energy E orresponding () mass of impacting object Me m E F + m g E + E m E F + m g E + E m m g µ E + E E gh m g h m g E + E E ω R m ω T R E + E Note ) ollision speed is momentary velocity at which object is impacting against shock absorber. The collision speed is = when the speed (average speed ) is calculated from the air cylinder s stroke time. Note ) An Impact body equivalent mass is the mass of an impact object without involving thrust, into which an object s total energy has been converted. Hence, E = Me Note 3) R: The distance between rotational center and impact point. et R at the minimum installation radius (page 90) or higher. E RJ RB Data A Kinetic Energy E or Energy Absorption E RB00 RB 00 to 7 Impact object mass m or corresponding mass Me (kg) Impact object mass m or corresponding mass Me (kg) E or E ymbol ymbol d E E E F g h () Ι n p R T t m Me ω µ pecifications Bore size Absorbed energy Kinetic energy Thrust energy ylinder thrust Acceleration of gravity (9.) Dropping height Moment of inertia around the center of gravity Operating frequency ylinder operating pressure Distance between axis of cylinder and impact point hock absorber stroke Torque Ambient temperature ollision speed Impact object mass orresponding mass of impact object Angle speed Friction coefficient Unit mm J J J N m / s m kg m cycle / min MPa m m N m m / s kg kg rad / s Note ) For the formula of moment of inertia Ι (kg m ), refer to the catalog of rotary actuator ollision speed (m/s) ollision speed (m/s) 97 D- -X

4 RB eries Data B Thrust Energy of ylinder F troke absorption (mm) Bore size d (mm) Operating pressure (MPa) 0. oefficient 0. RB RB RB 00 RB Operating pressure other than 0. MPa: Multiply by the following coefficient. Data Thrust Energy at m g s RB RB RB00 RB 00 to 7 (Operating pressure 0. MPa) (J) RB RB 0 RB Data D orresponding Mass of Impacting Object Me 0. Thrust energy at load m g s 0.0 Thrust energy at load m g s orresponding mass of impact object Me kg mass (kg) mass (kg) ollision speed m/s The graph of corresponding mass of impacting object: At room temperature (0 to )

5 hock Absorber RB eries With cap pecifications RB00 RB00 RB00 RB00 RB007 RB RB RB0 RB7 pecifications With cap RB00 RB00 RB00 RB007 RB RB RB0 RB7 Max. energy absorption (J) Note) Thread O.D. size M x 0.7 M x.0 M0 x.0 M x. M0 x. M7 x. troke (mm) 7 ollision speed (m/s) 0.3 to to.0 Max. operating frequency (cycle/min) Max. allowable thrust (N) Ambient temperature range ( ) 0 to 0 (No freezing) Extended pring force (N) Retracted Weight (g) With cap Note) The maximum energy absorption, the maximum corresponding mass of impacting object and maximum operating frequency are measured at room temperature (0 to ). How to Order RB RJ RB ymbol O.D. thread size mm mm mm 0 mm troke mm mm mm mm ymbol mm 7 mm Note) RB00: With cap type is not available. hock absorber Nil Type With cap O.D. thread size/troke O.D. thread size mm mm 0 mm 7 mm troke mm mm mm mm Option ymbol Nil J N J N Hex. nut pcs. 3 pcs. pcs. 3 pcs. Note) RB00: Nil or N only topper nut pc. pc. pc. Replacement part no./ap (Resin part only) RB 0 Applicable model 0 RB00, 00 0 RB0 0 RB00, RB7 RB, ap ap cannot be mounted for basic type. Please place an order with cap type from the beginning. 99 D- -X

6 RB eries onstruction RB00 Extended r t i o y w e u ompressed! q!0! omponent Parts No. Description Outer tube Piston 3 pring guide Piston rod topper Bearing 7 Return spring Rod seal 9 Accumulator 0 teel ball Hexagon socket head cap screw Hexagon nut Material Treatment Free-cutting steel Nitriding opper alloy tainless steel arbon steel Nitriding tainless steel opper alloy Piano wire Zinc trivalent chromated Foam rubber Bearing steel pecial steel Nickel plated arbon steel Nickel plated RB 00 to 7 Extended e!0!7!o! t!!3 qr y u i w!! ompressed omponent Parts No Description Outer tube Inner tube Piston rod Piston Bearing pring guide Lock ring Return spring eal holder topper teel ball et screw Accumulator Rod seal craper Gasket Gasket Material Rolled steel pecial steel pecial steel pecial steel pecial bearing material arbon steel opper Piano wire opper alloy arbon steel Bearing steel pecial steel Treatment Gray coated Heat treated Electroless nickel plated Heat treated Zinc chromated Zinc chromated Zinc chromated Foam rubber Only RB()0, 7 900

7 hock Absorber RB eries Dimensions RB00 Hexagon Nut ( pcs. standard equipment) M x M x 0.7 ø ø (9.) (9.) ø : RB00, RB00, RB00, RB007 With cap: RB00, RB00 RB00, RB007 Other dimensions are the same as the basic type. ap ap bracket RJ RB RB00 RB00 RB00 RB007 With cap RB00 RB00 RB00 RB007 D E.... E.... dimensions F H a L LL MM M x.0 M x.0 M0 x.0 M0 x With cap E3 LL Z Hexagon nut B h : RB, RB, RB0, RB7 With cap: RB, RB RB0, RB7 Other dimensions are the same as the basic type. ap ap bracket RB RB RB0 RB7 With cap RB RB RB0 RB7 D E.... E dimensions F H K L LL MM M x. M x. M0 x. M7 x With cap E3 LL Z Hexagon nut B h D- -X

8 RB eries Hexagon Nut ( pcs. standard equipment) Option topper nut For basic type For cap type Replacement Parts ap RB0J RB0J RB0J RBJ RB0J RB7J Material: pecial steel Treatment: Zinc trivalent chromated Dimensions MM h B M x M x.0 M0 x.0 M x. 9 M0 x. 7 M7 x With cap RB0 RB0 RB RB0 RB7 RB0 RB0 RB RB0 RB7 B Material: arbon steel Treatment: Zinc trivalent chromated h. Dimensions h MM 3 M x.0 3 M0 x.0 3 M x. 0 M0 x. M7 x. d f 0 33 ( These are the replacement part for the cap type. Not available for the basic type. Material: Polyurethane Dimensions A B R RB0 RB0 RB RB0 RB ) Foot Bracket for hock Absorber Available for the foot mounting bracket of the RB series. Dimensions RB0-X33 RB0-X33 RB-X33 RB0-X33 RB7-X33 Material: Aluminum alloy Treatment: Black hard anodized Applicable absorber Order foot brackets separately. RB 00, 00 RB 00, 007 RB, RB 0 RB 7 RB0-X33 RB0-X33 RB-X33 RB0-X33 RB7-X33 B D H. drill, counterbore depth. 7.. drill, 9. counterbore depth drill, counterbore depth.. drill, 7. counterbore depth drill, 0 counterbore depth 3 L MM M x.0 M0 x.0 M x. M0 x. M7 x. T 0 3 X 0 3 Mounting bolt M M M M0 M 90

9 RB eries pecific Product Precautions Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. Danger. Energy absorption elect a model so that the aggregated energy of impact object should not exceed the maximum absorption energy. Otherwise, it could cause changes in properties or result in damaging the shock absorber.. orresponding mass of impacting object Make a model selection, so that the corresponding mass of impacting object does not exceed the allowable range. Pulsation will occur in buffer and deceleration force, thus making it difficult to absorb shock smoothly. 3. ollision speed Use it in the conditions that collision speed is within the specified range. It could cause the changes in buffer characteristics or lead to damage a shock absorber. Warning. tatic load Design the system, so that any other forces than the buffer capacity or impacts should not be applied to the piston rod which is stopped at the retracted state.. Maximum operating frequency Design the system in the conditions under which it is not used at the frequency exceeding the specified maximum operating frequency.. troke The maximum absorption energy in the specifications cannot be exerted unless the full stroke is used for both RB and RBL eries. 3. Work surface of an impact object The contact surface of the impact object with which the piston rod comes into contact must be highly rigid. In the case without a cap, a high surface compression load is applied to the contact surface of the impact body with which the piston rod comes into contact. Therefore, the contact surface must be highly rigid (hardness of HR3 or more).. Be aware of the return force of the impact object. If used in a conveyor drive, after the shock absorber has absorbed energy, it could be pushed back by the spring that is built-in. For the spring force in the specifications, refer to the column (page 99).. election of size As the number of operation proceeds, the maximum absorption energy of shock absorbers will be decreased by the following reasons such as abrasion, or deterioration, etc. of the internal working fluid. Taking this into consideration, selecting a size which is 0 to 0% affordable against the amount of absorption energy is recommended.. Drag characteristics In general, the values of drag (reactive force generated during operation) generated by the operating speed will vary in hydraulic shock absorber. And then, by adopting Porous orifice construction, the RB series can adapt to such this fast/slow speed and can absorb shock smoothly in a wide range of speed. But, the speed reduction (speed reduction G) would be larger around the stroke terminal, depending upon the operating conditions. Please note that it might be encountered that stroke time is long, motion is not smooth, etc. If this would be a problem, we recommend that stroke amount should be restricted by using our optional component like topper nut, etc. election 7. Parallel usage When using multiple shock absorbers in parallel, energy will not be divided evenly because of differences in product dimensions and devices. For this reason, select the following options. E = Ea/N/0. E : Energy used per shock absorber Ea : All energies N : The number of shock absorbers used in parallel Danger Warning Operating Environment. Operation in an environment which requires explosion-proof When mounting in places where static electricity is accumulated, implement a distribution of electrical energy by grounding. Do not use the materials for buffer face which might cause to spark by collision.. Pressure Do not use it in the vacuum state, which is substantially different from the atmospheric pressure (above sea level) and in the atmosphere under being pressurized.. Using inside a clean room Do not use the shock absorber in a clean room, as it could contaminate the clean room.. Temperature range Do not use it, exceeding the specified allowable temperature range. eal could be softened or hardened or worn out, or leading to leak a working fluid, deterioration, or impact characteristic changes.. Deterioration by atmosphere Do not use the product in an environment where the product may be damaged by salt or air which contains organic solvent, phosphoester operating oil, sulfurous acid gas, chlorine gas or other acids. It may deteriorate seals or corrode metals. 3. Deterioration by ozone Do not use it under the direct sunlight on the beach, or by the mercury lamp, or the ozone generator, because the rubber material will be deteriorated by ozone.. utting oil, water, blown dust Do not use the product under the condition, where the liquid such as cutting oil, water, solvent, etc. is exposed either directly or in atomized form to the piston rod, or where blown dust could be adhered around the piston rod. This could cause malfunction. 903 RJ RB D- -X

10 RB eries pecific Product Precautions Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. Operating Environment. Vibration When vibrations are applied on impact objects, implement a secure guide on impact objects. Mounting Warning. Before performing installation, removal, or stroke adjustment, make sure to cut the power supply to the equipment and verify that the equipment has stopped.. Installation of protective cover We recommend the protective cover should be installed in the case workers might be getting close during the operation. 3. The rigidity of the mounting frame The mounting frame must have sufficient rigidity. on mounting plate can be calculated as follows. Mounting. Deviation of impact The installation must be designed so that the impact body is perpendicular to the shock absorber's axial center. An angle of deviation that exceeds 3 will place an excessive load on the bearings, leading to oil leaks within a short period of operation. Allowable eccentric angle θ 3 With cap θ 3. Rotating angle If rotating impacts are involved, the installation must be designed so that the direction in which the load is applied is perpendicular to the shock absorber s axial center. The allowable rotating angle until the stroke end must be θ < 3. E (Absorbed energy : J) on mounting plate N (troke : m) Depending on the impact conditions, a load applied to the mounting frame may exceed the calculated value. When setting the rigidity of the mounting frame, the sufficient safety ration must be taken into account in the calculated value.. Tightening torque of mounting nut should be as follows. When threading on a mounting frame in order to mount a shock absorber directly, prepared hole dimensions are referred to the table below. For tightening torque of a nut for shock absorber, kindly abide by the table below. If the tightening torque that is applied to the nut exceeds the value given below, the shock absorber itself could become damaged. O.D. thread (mm) Thread prepared bore (mm) Tightening torque (N m) RB00 M x 0.7 ø RB()0 RB()7 O.D. thread (mm) M0 x. M7 x. Thread prepared bore ø ø.7 (mm) Tightening torque (N m) 3.. RB()00 RB()00 RB() RB()00 RB()007 RB() M x.0 M0 x.0 M x. ø ø ø Allowable rotating eccentric angle θ 3 Installation onditions for Rotating Impact (mm) θ R (Min. installation radius) (troke) (Allowable rotating angle) With cap RB00 RB 00 RB 00 RB 00 RB 007 RB RB RB 0 RB Do not scratch the sliding portion of the piston rod or the outside threads of the outer tube. Failure to observe this precaution could scratch or gouge the sliding potion of the piston rod, or damage the seals, which could lead to oil leakage and malfunction. Furthermore, damage to outside threaded portion of the outer tube could prevent the shock absorber from being mounted onto the frame, or its internal components could deform, leading to a malfunction.. Never turn the screw on the bottom of the body. This is not an adjusting screw. Turning it could result in oil leakage. Piston rod Bottom set screw (Do not rotate) Damage is not allowed. 90

11 RB eries pecific Product Precautions 3 Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. : hock absorber stroke (atalog values) Mounting. Adjust the stopping time through the use of the stopper nut, as follows: ontrol the stopping time of the impact object by turning the stopper nut in or out (thus changing length a ). After establishing the stopper nut position, use a hexagon nut to secure the stopper nut in place. apacity of shock absorbers deteriorate in accordance with usage. When crashing sounds or vibrations are generated during the operation, adjust the stopper nut and make the effective stroke (a) longer, or give the stroke enough leeway beforehand. topper nut ervice Life and Replacement Period of hock Absorber. Allowable operating cycle under the specifications set in this catalog is shown below.. million cycles RB00, RB0 million cycles RB0 to RB7 million cycles RBA, RBL Note) pecified service life (suitable replacement period) is the value at room temperature (0 to ). The period may vary depending on the temperature and other conditions. In some cases the absorber may need to be replaced before the allowable operating cycle above. RJ Maintenance. heck the mounting nut is not loosen. The shock absorber could become damaged if it is used in a loose state.. Pay attention to any abnormal impact sounds or vibrations. If the impact sounds or vibrations have become abnormally high, the shock absorber may have reached the end of its service life. If this is the case, replace the shock absorber. If use is continued in this state, it could lead to equipment damage. 3. onfirm that abnormality, oil leakage, etc. in the outward surface. When a large amount of oil is leaking, replace the product, because it is believed to be happening something wrong with it. If it keeps on using, it may cause to break the equipment which is mounted by this product.. Inspect the cap for any cracks or wear. If the shock absorber comes with a cap, the cap could wear first. To prevent damage to the impact object, replace the cap often. RB torage. Piston rod position while stored If a piston rod is stored as pushed in for a long period of time (over 30 days), absorption capacity may decrease. Avoid storing like this for a long time. D- 90 -X

12 hock Absorber: oolant Resistant Type RBL eries an be operated in an environments exposed to non-water soluble cutting oil. (Mainly JI lass equivalent) craper and rod seal combine to form a double seal enclosure preventing cutting oil from entering inside. pecifications RBL00 RBL007 RBL RBL RBL0 RBL7 pecifications With cap RBL00 RBL007 RBL RBL RBL0 RBL7 Max. energy absorption (J) Note) Thread O.D. size M0 x.0 M x. M0 x. M7 x. troke absorption (mm) 7 ollision speed (m/s) 0.0 to Max. operating frequency (cycle/min) Max. allowable thrust (N) 9 9 Ambient temperature range ( ) 0 to 0 Effective atmosphere Non-water soluble cutting oil pring force Extended (N) Retracted Weight (g) With cap Note) The maximum energy absorption and maximum operating frequency are measured at room temperature (0 to ). Replacement part no./ ap (Resin part only) With cap RB 0 Applicable model 0 RBL00, RBL0 RBL, 7 RBL7 ap cannot be mounted for basic type. Please place an order with cap type from the beginning. onstruction hock absorber oolant resistant type ap RB L Nil Type With cap How to Order O.D. thread size/troke ymbol O.D. thread size troke 00 0 mm mm mm 7 mm mm mm ymbol 0 7 Option ymbol Nil J N J N Hex. nut pcs. 3 pcs. pcs. 3 pcs. O.D. thread size mm 0 mm 7 mm topper nut pc. pc. pc. troke mm mm mm 90 omponent Parts No Description Outer tube Inner tube Piston rod Piston Bearing pring guide Lock ring Return spring eal holder topper teel ball et screw Accumulator Rod seal craper Gasket Gasket Material Treatment Rolled steel Gray coated pecial steel Heat treated pecial steel Electroless nickel plated pecial steel Heat treated pecial bearing material arbon steel Zinc chromated opper Piano wire Zinc chromated opper alloy arbon steel Zinc chromated Bearing steel pecial steel Foam rubber Only RBL()0, 7

13 hock Absorber: oolant Resistant Type RBL eries Dimensions : RBL00, RBL007 With cap: RBL00, RBL007 Other dimensions are the same as the basic type. ap ap bracket dimensions With cap D E E F H a L LL MM RBL00 RBL007 RBL00 RBL M0 x.0 M0 x.0 Note) L, LL and dimensions of RBL()007/00 are different from those of RB()007/00. : RBL RBL RBL0 RBL7.. With cap E3 LL Z Hexagon nut B h.. With cap: RBL RBL RBL0 RBL7 Other dimensions are the same as the basic type. ap ap bracket RJ RB RBL RBL RBL0 RBL7 With cap RBL RBL RBL0 RBL7 D E.... E dimensions F H K L LL Note) L, LL and dimensions are different from those of RB() (except RBL()0). MM M x. M x. M0 x. M7 x With cap E3 LL Z Hexagon nut B h Hexagon Nut Option Replacement Parts ( pcs. standard equipment) topper nut For basic type For cap type ap RB0J RBJ RB0J RB7J Material: pecial steel Treatment: Zinc trivalent chromated Dimensions MM h B M0 x.0 M x. 9 M0 x. 7 M7 x With cap RB0 RB RB0 RB7 RB0 RB RB0 RB7 B Material: arbon steel Treatment: Zinc trivalent chromated h Dimensions h MM 3 M0 x.0 3 M x. 0 M0 x. M7 x. d 3 3 f 0 33 ( These are the replacement part for the cap type. Not available for the basic type. Material: Polyurethane Dimensions A B R RB0 RB RB0 RB ) 907 D- -X

14 RBL eries Foot Bracket for hock Absorber Available for the foot mounting bracket of the RBL series. Material: Aluminum alloy Treatment: Black hard anodized Applicable absorber RB0-X33 RB-X33 RB0-X33 RB7-X33 Order foot brackets separately. RB 00, 007 RB, RB 0 RB 7 Dimensions RB0-X33 RB-X33 RB0-X33 RB7-X33 B D H. drill, 9. counterbore depth drill, counterbore depth.. drill, 7. counterbore depth drill, 0 counterbore depth 3 L MM M0 x.0 M x. M0 x. M7 x. T 3 X 3 Mounting bolt M M M0 M 90

15 hock Absorber: hort Type RBQ eries Allowable eccentric angle is Allowable eccentic angle θ Ideal for absorption of rotating energy With bumper RBQ series onstruction RBQ series Replacement part no./bumper RBQ pecifications pecifications With bumper RBQ0 RBQ0 RBQ007 RBQ007 Max. energy absorption (J) Note).9. Thread O.D. size M x. M0 x. troke absorption (mm) 7 ollision speed (m/s) Max. operating frequency (cycle/min) 0 0 Max. allowable thrust (N) 9 90 Ambient temperature ( ) Extended pring force (N) Retracted Weight (g) Option/topper nut RBQ RB0 RBQ RBQ30 RBQ3 Note) The maximum energy absorption and maximum operating frequency are measured at room temperature (0 to ). hock absorber How to Order RBQ 0 07 RBQ0 RBQ0 9. M x. 0.0 to 3 0 to 0 RBQ3009 RBQ M30 x.. Option ymbol Hex. nut Applicable model hort type Nil pcs. RBQ0 30 RBQ3009 Bumper Type J 3 pcs. 0 RBQ007 3 RBQ33 Nil N RBQ0 With bumper pcs. mounting hexagon nuts are O.D. thread size/troke J 3 pcs. attached as standard. ymbol O.D. thread size troke ymbol O.D. thread size troke N 0 mm mm mm 9 mm mm 7 mm 33 3 mm 3 mm 0 mm mm Bumper cannot be mounted for basic type. Please place an order with bumper type from the beginning. 9 RBQ33 RBQ M3 x topper nut pc. pc. pc. At impact At returning omponent Parts No An impact object that strikes against the piston rod end pressurizes oil inside the piston. Thus, pressurized oil jets out through the orifice inside the piston, thereby generating hydraulic resistance to absorb the energy of the impacting object. The oil jetted out through the orifice is collected inside the outer tube by means of the stretching action of the accumulator. Description Outer tube Piston rod Piston Bearing Return spring topper Material Treatment No. Black electroless nickel plated Heat treated, Hard chrome plated Heat treated Rolled steel pecial steel pecial steel pecial bearing material Piano wire arbon steel Zinc chromated Zinc chromated When the impact object is removed, the return spring pushes out the piston rod, and negative pressure, generated at the same time, opens the check ball to permit oil to return to the inside of the piston rod and the piston, making the shock absorber ready for the next impact Description heck ball Accumulator Rod seal craper Bumper Material Bearing steel Fluororubber Polyurethane Treatment Foam rubber Only with bumper

16 hock Absorber: hort Type RBQ eries Dimensions Bumper RBQ series RBQ series With bumper RBQ0 RBQ007 RBQ0 RBQ3009 RBQ33 Hexagon Nut With bumper RBQ0 RBQ007 RBQ0 RBQ3009 RBQ33 ( pcs. standard equipment) D 0 E F 3. Option H 7. 3 topper nut hock absorber K G LL MM M x. M0 x. M x. M30 x. M3 x B 7 3 Replacement Parts Bumper Hexagon nut h RJ RB RBQJ RB0J () RBQJ RBQ30J RBQ3J Material: pecial steel Treatment: Zinc trivalent chromated MM M x. M0 x. M x. M30 x. M3 x. h B Note ) In the case of RB0J, RB and RBQ are common. RBQ RB0 () RBQ RBQ30 RBQ3 Material: arbon steel Treatment: Zinc trivalent chromated B h 0 MM M x. M0 x. M x. M30 x. M3 x. Note ) In the case of RB0, RB and RBQ are common. ( These are the replacement part for the with bumper type. Not available for the basic type. RBQ RBQ0 RBQ RBQ30 RBQ3 ) A 3... Material: Polyurethane B D- -X

17 hock Absorber: hort Type RBQ eries Technical Data: election election tep. Type of impact ylinder stroke at load (Horizontal) ylinder stroke at load (Downward) ylinder stroke at load (Upward) onveyor stroke at load (Horizontal) Free dropping impact Rotating impact (With torque) election Example. Type of impact ylinder stroke at load (Horizontal) ylinder hock absorber. Enumeration of operating conditions ymbol m h ω R d p F T n t µ 3. pecifications and operational instructions Ensure that the collision speed, thrust, operation cycle, the ambient temperature and atmosphere fall within the specifications. Be aware of the min. installation radius in the case of rotating impacts.. alculation of kinetic energy E Using the equation suitable for the classification of impact. In the case of cylinder stroke at load and free horizontal impact, substitute respective figures for Data A in order to calculate E.. alculation of thrust energy E elect any shock absorber as a provisional model. In the case of thrust energy of cylinder E, substitute respective figures for Data B or Data.. alculation of corresponding mass of impacting object Me Absorbed energy E = E + E orresponding mass of impacting object Me = E 7. election of applicable model Taking into consideration the corresponding mass of the impacting object Me, calculated using Data D and collision speed, check provisional model compatibility with the condition of application. If this is satisfactory, then the said provisional model will be the applicable one. on election Unit kg m/sec m rad/sec m mm MPa N N m cycle/min In order for the shock absorbers to operate accurately for long hours, it is necessary to select a model that is well-suited to your operating conditions. If the impact energy is smaller than % of the maximum energy absorption, select a model that is one class smaller. ubstitute both absorbed energy E and collision speed for Data A in order to calculate the corresponding mass of the impacting object Me. 9 Operating conditions Impacting object mass ollision speed Dropping height Angle speed Distance between axis of cylinder and impact point Bore size ylinder operating pressure Thrust Torque Operation cycle Ambient temperature Friction coefficient ollision speed () Kinetic energy E Thrust energy E Absorbed energy E orresponding () mass of impacting object Me. Operating conditions 3. pecifications and operational instructions m F E + E E. Thrust energy E Provisionally select a model alculation RBQ0 and make the use of of thrust Data B. According to d = 0, E is obtained. energy E E.0 J election of applicable model According to Data D, the tentatively selected RBQ0 satisfies 7. Me = 0 kg < 0 kg at = 0.7. Ultimately, it will result in an operating election of frequency of n 30 <, without applicable causing a problem. model YE m = 0 kg = 0.7 m/s d = 0 mm p = 0. MPa n = 30 cycle/min t = onfirmation of specifications 0.7 < 3 (max.) t 0 (min.) < < 0 (max.) F F < (max.) YE. Kinetic energy E Use Formula to calculate E. alculation uitable 0 for m and 0.7 for. of kinetic E.9 J energy E. alculation of corresponding mass of impacting object Me orresponding mass of impacting object Me Use the formula Absorbed energy E = E + E = = 9.9 J to calculate Me. ubstitute 9.9 J for E and 0.7 for. Me 0 kg elect RBQ0 Impact object mass m or corresponding mass Me (kg) Data A Kinetic Energy E or Energy Absorption E E or E ollision speed (m/s)

18 hock Absorber: hort Type RBQ eries. Type of Impact ylinder stroke at load (Downward) ylinder stroke at load (Upward) onveyor stroke at load (Horizontal) Free dropping impact Rotating impact (With torque) Type of impact ylinder ylinder (3) ollision speed () Kinetic energy E Thrust energy E Absorbed energy E orresponding () mass of impacting object Me m F + m g E + E E m F m g E + E E Note ) ollision speed is momentary velocity at which object is impacting against shock absorber. The collision speed is = when the speed (average speed ) is calculated from the air cylinder s stroke time. Note ) An Impact body equivalent mass is the mass of an impact object without involving thrust, into which an object s total energy has been converted. Hence, E = Me Note 3) R: The distance between rotational center and impact point. et R at the minimum installation radius (page 9) or higher. m m g µ E + E E gh m g h m g E + E E ω R Ι ω T R E + E E RJ RB Data B Thrust Energy of ylinder F troke absorption (mm) Bore size d (mm) Operating pressure (MPa) oefficient RBQ 0 RBQ 007 RBQ 0 RBQ 3009 RBQ Operating pressure other than 0. MPa: Multiply by the following coefficient (Operating pressure 0. MPa) (J) ymbol ymbol d E E E F g h Ι () n p R T t m Me ω µ pecifications Bore size Absorbed energy Kinetic energy Thrust energy ylinder thrust Acceleration of gravity (9.) Dropping height Moment of inertia around the center of gravity Operating frequency ylinder operation pressure Distance between axis of cylinder and impact point hock absorber stroke Torque Ambient temperature ollision speed Impact object mass orresponding mass of impact object Angle speed Friction coefficient Unit mm J J J N m/s m kg m cycle/min MPa m m N m m/s kg kg rad/s Note ) For the formula of moment of inertia Ι (kg m ), refer to the catalog of rotary actuator. 93 D- -X

19 RBQ eries Data Thrust Energy at m g s Data D orresponding Mass of Impacting Object Me Thrust energy at load m g s RBQ 33 RBQ 0 RBQ 3009 RBQ 0 RBQ 007 Mass equivalent to impact object Me (kg) RBQ 33 RBQ 3009 RBQ 0 RBQ 007 RBQ mass (kg) ollision speed (m/s) The corresponding mass graph shows the values at room temperature (0 to ). 9

20 RBQ eries pecific Product Precautions Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. Danger. Energy absorption elect a model so that the aggregated energy of impact object should not exceed the maximum absorption energy. Otherwise, it could cause changes in properties or result in damaging the shock absorber.. orresponding mass of impacting object Make a model selection, so that the corresponding mass of impacting object does not exceed the allowable range. Pulsation will occur in buffer and deceleration force, thus making it difficult to absorb shock smoothly. 3. ollision speed Use it in the conditions that collision speed is within the specified range. It could cause the changes in buffer characteristics or lead to damage a shock absorber. Warning. tatic load Design the system, so that any other forces than the buffer capacity or impacts should not be applied to the piston rod which is stopped at the retracted state.. Maximum operating frequency Design the system in the conditions under which it is not used at the frequency exceeding the specified maximum operating frequency.. troke The maximum absorption energy in the specifications cannot be exerted unless the full stroke is used. 3. Work surface of an impact object The contact surface of the impact object with which the piston rod comes into contact must be highly rigid. In the case without a cap, a high surface compression load is applied to the contact surface of the impact body with which the piston rod comes into contact. Therefore, the contact surface must be highly rigid (hardness of HR3 or more).. Be aware of the return force of the impact object. If used in a conveyor drive, after the shock absorber has absorbed energy, it could be pushed back by the spring that is built-in. For the spring force in the specifications, refer to the column (page 90).. election of size As the number of operation proceeds, the maximum absorption energy of shock absorbers will be decreased by the following reasons such as abrasion, or deterioration, etc. of the internal working fluid. Taking this into consideration, selecting a size which is 0 to 0% affordable against the amount of absorption energy is recommended. election. Drag characteristics In general, the values of drag (reactive force generated during operation) generated by the operating speed will vary in hydraulic shock absorber. And then, by adopting Porous orifice construction, the RB series can adapt to such this fast/slow speed and can absorb shock smoothly in a wide range of speed. But, the speed reduction (speed reduction G) would be larger around the stroke terminal, depending upon the operating conditions. Please note that it might be encountered that stroke time is long, motion is not smooth, etc. If this would be a problem, we recommend that stroke amount should be restricted by using our optional component like topper nut, etc. 7. Parallel usage When using multiple shock absorbers in parallel, energy will not be divided evenly because of differences in product dimensions and devices. For this reason, select the following options. E = Ea/N/0. E : Energy used per shock absorber Ea : All energies N : The number of shock absorbers used in parallel Danger Warning Operating Environment. Operation in an environment which requires explosion-proof When mounting in places where static electricity is accumulated, implement a distribution of electrical energy by grounding. Do not use the materials for buffer face which might cause to spark by collision.. Pressure Do not use it in the vacuum state, which is substantially different from the atmospheric pressure (above sea level) and in the atmosphere under being pressurized.. Using inside a clean room Do not use the shock absorber in a clean room, as it could contaminate the clean room.. Temperature range Do not use it, exceeding the specified allowable temperature range. eal could be softened or hardened or worn out, or leading to leak a working fluid, deterioration, or impact characteristic changes.. Deterioration by atmosphere Do not use the product in an environment where the product may be damaged by salt or air which contains organic solvent, phosphoester operating oil, sulfurous acid gas, chlorine gas or other acids. It may deteriorate seals or corrode metals. RJ RB 9 D- -X

21 RBQ eries pecific Product Precautions Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. Operating Environment 3. Deterioration by ozone Do not use it under the direct sunlight on the beach, or by the mercury lamp, or the ozone generator, because the rubber material will be deteriorated by ozone.. utting oil, water, blown dust Do not use the product under the condition, where the liquid such as cutting oil, water, solvent, etc. is exposed either directly or in atomized form to the piston rod, or where blown dust could be adhered around the piston rod. This could cause malfunction.. Vibration When vibrations are applied on impact objects, implement a secure guide on impact objects. Mounting Warning. Before performing installation, removal, or stroke adjustment, make sure to cut the power supply to the equipment and verify that the equipment has stopped.. Installation of protective cover We recommend the protective cover should be installed in the case workers might be getting close during the operation. 3. The rigidity of the mounting frame The mounting frame must have sufficient rigidity. on mounting plate can be calculated as follows. E (Absorbed energy : J) on mounting plate N (troke : m) Depending on the impact conditions, a load applied to the mounting frame may exceed the calculated value. When setting the rigidity of the mounting frame, the sufficient safety ration must be taken into account in the calculated value.. Tightening torque of mounting nut should be as follows. When threading on a mounting frame in order to mount a shock absorber directly, prepared hole dimensions are referred to the table below. For tightening torque of a nut for shock absorber, kindly abide by the table below. If the tightening torque that is applied to the nut exceeds the value given below, the shock absorber itself could become damaged. Allowable eccentric angle θ Allowable rotating eccentric angle θ Mounting. Deviation of impact. The installation must be designed so that the impact body is perpendicular to the shock absorber's axial center. An angle of deviation that exceeds will place an excessive load on the bearings, leading to oil leaks within a short period of operation. 3. Rotating angle If rotating impacts are involved, the installation must be designed so that the direction in which the load is applied is perpendicular to the shock absorber s axial center. The allowable rotating eccentric angle until the stroke end must be θ. R θ Installation onditions for Rotating Impact (mm) θ R (troke) (Allowable rotating angle) (Min. installation radius) RBQ 0 RBQ 007 RBQ 0 RBQ 3009 RBQ Do not scratch the sliding portion of the piston rod or the outside threads of the outer tube. Failure to observe this precaution could scratch or gouge the sliding potion of the piston rod, or damage the seals, which could lead to oil leakage and malfunction. Furthermore, damage to outside threaded portion of the outer tube could prevent the shock absorber from being mounted onto the frame, or its internal components could deform, leading to a malfunction.. Never turn the screw on the bottom of the body. This is not an adjusting screw. Turning it could result in oil leakage. O.D. thread (mm) M x. Thread prepared bore (mm) ø Tightening torque (N m).7 RBQ()0 RBQ()007 RBQ()0 RBQ()3009 M0 x. M x. ø ø RBQ()33 M30 x. M3 x. ø ø Piston rod Damage is not allowed. Bottom set screw (Do not rotate) 9

22 RBQ eries pecific Product Precautions 3 Be sure to read this before handling the products. Refer to back page 0 for afety Instructions. : hock absorber stroke (atalog values) Mounting. Adjust the stopping time through the use of the stopper nut, as follows: ontrol the stopping time of the impact object by turning the stopper nut in or out (thus changing length a ). After establishing the stopper nut position, use a hexagon nut to secure the stopper nut in place. apacity of shock absorbers deteriorate in accordance with usage. When crashing sounds or vibrations are generated during the operation, adjust the stopper nut and make the effective stroke (a) longer, or give the stroke enough leeway beforehand. topper nut ervice Life and Replacement Period of hock Absorber million cycles torage. Piston rod position while stored If a piston rod is stored as pushed in for a long period of time (over 30 days), absorption capacity may decrease. Avoid storing like this for a long time.. Allowable operating cycle under the specifications set in this catalog is shown below. Note) pecified service life (suitable replacement period) is the value at room temperature (0 to ). The period may vary depending on the temperature and other conditions. In some cases the absorber may need to be replaced before the allowable operating cycle above. Maintenance. heck the mounting nut is not loosen. The shock absorber could become damaged if it is used in a loose state.. Pay attention to any abnormal impact sounds or vibrations. If the impact sounds or vibrations have become abnormally high, the shock absorber may have reached the end of its service life. If this is the case, replace the shock absorber. If use is continued in this state, it could lead to equipment damage. 3. onfirm that abnormality, oil leakage, etc. in the outward surface. When a large amount of oil is leaking, replace the product, because it is believed to be happening something wrong with it. If it keeps on using, it may cause to break the equipment which is mounted by this product.. Inspect the bumper for any cracks or wear. If the shock absorber comes with a bumper, the damper could wear first. To prevent bumper to the impact object, replace the bumper often.. How to replace bumper The bumper inserted into the piston rod can be removed easily by a small screwdriver. When reassembling, push the smaller end of the bumper inside the piston. RJ RB Bumper 97 D- -X

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